BBOS uses the principles of circular economy, social economy and consumer economy to create a new business model based on blockchain technology. BBOS is a diversified blockchain accounting tool that allows users to register and use it free of charge. Under various consumption scenarios, BBOS DAPP adopts flexible ledger mode. Based on the characteristics of trust network and blockchain decentralization, it can open node ledger before and after actual consumption to cochain and broadcast effective consumption data. Once miners confirmed after 21 times of implementation of smart contract in the blockchain node network, the ledger is successful. Then users and miners will be rewarded proportional token, realizing closed-loop development of ecological value.